Rasta Keep One Rolled Ganja T-Shirt. Rastafarianism is a religion that began in Jamaica in the 1930s, combining Protestant Christianity with mysticism and a pan-African political consciousness. Rastas use ganja (cannabis) as part of a spiritual, meditative practice. Digitally Printed on soft superior 100% Cotton, Triblend, 50/50 premium Soft Style Quality T-shirts. Not Slim Fit Size XXL is Heavy Cotton. The Design Is Blended into the fabric of the shirt, No Peeling or Cracking High Quality Print. Quick Shipping By USPS First Class mail.